docs: add comprehensive Phase 2 documentation

- Create detailed README.md with quick start and demo accounts
- Add complete UI primitives documentation with examples
- Document architecture patterns and design decisions
- Update REBUILD_PLAN.md marking Phase 2 as complete
- Include component usage guides and testing documentation
- Document accessibility compliance and performance considerations

Documentation provides complete developer onboarding experience
with practical examples and architectural guidance.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

reactrebuild0825/QA_TESTING_GUIDE.md

@@ -0,0 +1,92 @@
+# QA Testing Quick Start Guide
+
+## Prerequisites
+1. **Start the development server** (required for all tests):
+   ```bash
+   npm run dev
+   ```
+   Wait for server to start on `http://localhost:5173`
+
+2. **Install dependencies** (one-time setup):
+   ```bash
+   npm install
+   npx playwright install
+   ```
+
+## Running Tests
+
+### Option 1: Complete QA Suite (Recommended)
+```bash
+# Run all tests with comprehensive reporting
+npm run test:qa
+```
+
+### Option 2: Critical Tests Only
+```bash
+# Run only authentication and navigation tests
+npm run test:qa:critical
+```
+
+### Option 3: Individual Test Suites
+```bash
+npm run test:auth         # Login/logout flows
+npm run test:navigation   # Menu and routing
+npm run test:theme        # Light/dark theme switching
+npm run test:responsive   # Mobile/tablet/desktop layouts
+npm run test:components   # UI elements and interactions
+```
+
+### Option 4: Debug Mode (Visible Browser)
+```bash
+# Watch tests run in real browser windows
+npm run test:qa:headed
+```
+
+## Demo Accounts
+Use these credentials when prompted:
+
+- **Admin**: `admin@example.com` / `demo123`
+- **Organizer**: `organizer@example.com` / `demo123`  
+- **Staff**: `staff@example.com` / `demo123`
+
+## Results
+
+After tests complete, check:
+
+1. **Console Output** - Pass/fail summary
+2. **HTML Report** - Open `./playwright-report/index.html` in browser
+3. **Screenshots** - Visual evidence in `./screenshots/` folder
+4. **QA Summary** - Executive report in `./test-results/qa-report.md`
+
+## Success Criteria
+
+✅ **Ready for Production**:
+- All critical tests pass (auth + navigation)
+- No console errors during test execution
+- Screenshots show proper styling in light/dark themes
+- Mobile layouts render correctly
+
+⚠️ **Needs Review**:
+- Critical tests failing
+- UI elements not rendering as expected
+- Accessibility issues detected
+
+## Troubleshooting
+
+**"Connection refused" errors**:
+- Ensure `npm run dev` is running in separate terminal
+- Wait for "Local: http://localhost:5173" message
+
+**Permission errors**:
+- Run `chmod 755 screenshots` to fix screenshot folder permissions
+
+**Browser issues**:
+- Run `npx playwright install --force` to reinstall browsers
+
+## Quick Health Check
+```bash
+# 2-minute smoke test (critical functionality only)
+npm run test:qa:critical
+```
+
+This validates the most important user flows for premium venue customers.